Wooden Terraces: Costs, Permits, and How to Build Them

Timber green‑building has revolutionised the way we conceive outdoor spaces, making wooden terraces an increasingly popular solution to enhance a home. These areas strike a perfect balance between functionality, environmental sustainability and contemporary design.

A concrete example of our work is found in Jūrmala, Latvia, where we built a 60 m² terrace that completely transformed our clients’ living experience. Located just 20 km from Riga, this Baltic seaside resort provided the backdrop for a project combining advanced technology and environmental respect.

Index

• Advantages of Wooden Terraces
• How to Build a Wooden Terrace
• Permits Required for Construction
• Construction Costs
• Maintenance and Lifespan
• Best Time to Build
• Conclusions

Advantages of Wooden Terraces

Wooden terraces offer numerous advantages over traditional solutions. Aesthetically, timber blends naturally with any architectural style, creating continuity between indoors and outdoors. Environmental sustainability is a key added value: using eco‑compatible materials such as boards made of recycled wood and polymers reduces environmental impact.

Thermal comfort is another hallmark: unlike other materials, wood does not overheat, keeping the surface pleasant even on the hottest days. Moreover, a well‑designed wooden terrace significantly increases property value, turning unused areas into liveable, functional spaces.

How to Build a Wooden Terrace: Step‑by‑Step Guide

1. Sub‑base Preparation

The preparatory phase is crucial for terrace longevity. The sub‑base must be perfectly levelled with sand, gravel or compacted crushed stone. Paving stones or concrete slabs are then laid to form a stable base.

Key point: never build directly on lawn. Natural ground does not provide the necessary stability and may settle over time.

2. Installing the Sub‑structure

The load‑bearing frame is set with joists spaced about 40 cm apart, using a level for perfect alignment. A minimum slope of 2 % must be created to drain rainwater. For grooved boards, the slope follows the board length.

3. Laying the Boards

Boards are installed with uniform gaps to allow material expansion and water drainage. A folding rule can act as a spacer for even spacing. Each board is firmly fixed to the sub‑structure with exterior‑grade screws.

4. Finishing Touches

Once all boards are laid, excess length is trimmed along the perimeter. Visible sides can be clad with matching boards for a uniform, professional look.

Permits Required for Construction

Italian regulations differentiate several cases:

Open terrace: generally needs no specific permit if distance from boundaries and size limits are respected.

Enclosed veranda: adding fixed glazing requires a Building Permit from the municipality because it creates new habitable volume.

Roof‑slab conversion: turning an existing slab into a terrace always requires a Building Permit due to change of use.

Before starting work, always consult the municipal technical office to check any local constraints.

Construction Costs

The cost of a wooden terrace depends on several factors:

Materials

• Natural wood: €30 – €80 /m² for decking
• Composite wood: €40 – €100 /m² for decking
• Sub‑structure: €15 – €25 /m²

Labour

• Basic installation: €25 – €40 /m²
• Complex works: €40 – €60 /m²

Additional Costs

• Sub‑base preparation: €10 – €20 /m²
• Permits and paperwork: €500 – €1,500
• Accessories and finishes: €5 – €15 /m²

Total estimate: for a medium‑sized terrace (30 – 50 m²), costs range from €3,000 to €8,000, including materials and labour.

Maintenance and Lifespan

A well‑built wooden terrace requires minimal maintenance. Composite timber needs only periodic cleaning with water and mild detergents. Natural wood may require protective treatments every 2‑3 years to preserve appearance and weather resistance.

With proper care, a wooden terrace can last over 15‑20 years, making it a long‑term investment in property value.

Best Time to Build

The ideal construction period is summer, when weather conditions favour sub‑base preparation and material installation. This timing also lets you test the terrace immediately during peak‑use months.

Conclusions

A wooden terrace is more than an extension – it is a true enhancement that creates new spaces for relaxation and socialising. The initial investment is amply repaid by increased property value and improved quality of life.

Selecting sustainable materials and relying on skilled professionals ensures a durable result perfectly integrated with existing architecture. As shown by our Jūrmala project, a well‑designed terrace radically transforms the perception and use of outdoor areas, creating a unique environment where nature and technology meet in perfect harmony.